Coal-mining machine



3 Sheets-Sheet 1.

(No Model.)

J, W. HARRISON. GOAL MINING MACHINE.

Patented Oct. 23,

3 Sheets--Sheet 2.-

(No Model.)

J. W. HARRISON.

GOAL MINING MACHINE.

Patented Oct. 28, 1888.

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N PETERS. Pimp-Lithographer. washin mn. n. cy

3 Sheets-Sheet 3.

(No Model.)

J. W. HARRISON. GOAL MINING MACHINE.

N0. 391,707. Patented 005. 23, 1888.

N. PETERS Phalainlmgmphcr, \Vnshinuknn. D. C

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JONATHAN WV. HARRISON, OF YPSILANTI, ASSIGNOR OF ONEHALF TO CHARLES R. MILLER, OF ADRIAN, MICHIGAN.

COAL=IVIINING MACHINE.

SPECIFICATION forming part of Letters Patent No. 391,707, dated October 23, 1888.

(No model.)

To aZZ whom it may concern;

Be it known that I, JONATHAN W. HARRI- soN, a citizen of the United States, residing at Ypsilanti, in the county of Washtenaw and State of Michigan, have invented certain new and useful Improvements in Goal-Mining lllachines, of which the following is a specification.

My invention has reference to those coalmining machines in which a reciprocating motion is imparted to the picks or cutters by engines mounted upon the machine itself and supplied with steam or compressed air from any convenient source.

The present improvements relate particularly to means for feeding the cutters or picks slowly forward to their work and quickly retracting them therefrom by connections with the same engines employed for reciprocating the picks.

The improvements further relate to the stand or platform upon the machine whereon the operator may be supported free from the Working parts of the machine.

To these ends I form the main stationary frame of the machine, on which the drivingengines are supported, rectangular, and mount on the long parallel sides thereof slides whereon are mounted the feed-bars of the cutters or picks, so as. to be capable of movement transverse of the main frame-that is, to or from the face of the coal at any point of the stroke ofthe slides. The feed-bars are provided with racks longitudinal thereof, wherewith engage pinions on shafts mounted so as to accompany the movement of said feed-bars longitudinal of the machine. On these shafts, called herein the feedshafts, are mounted worm-wheels, wherewith engage worms which are mounted on shafts transverse of the machine. Such transverse shafts are supported in the slides and accompany them in their movement longitudinal of the machine, and they are made to have a slow forward feeding movement or a quick return movement imparted to them by the reciprocation of the whole cutter-frame. The mechanism for accomplishing this portion of my invention will be more fully described with reference to the drawings. At each end of the main frame brackets are provided for supporting arms, on whose outer ends is fixed a platform for the "operator.

In the accompanying drawings, Figure I is a plan view of my improved coalmining machine. Fig. II is a side elevation thereof, the cutter-bar and its supporting rack-bars being removed. Fig. III is a longitudinal sectional view of the machine on the line III III, Fig. I. Fig. IV is a sectional detail view of a portion of the feedmechanism, for greater clearness but portions of the cogs are shown in full lines. Fig. V is a side view of the cutterbar and picks. Fig. VI is a longitudinal section taken on the line VI VI, Fig. lV.

1 represents the main frame or body of the machine, rectangular in shape. Guides 3 are fixed t0 the lower sides of the main frame 1 and occupy grooves on the inner faces of slides 4. Crossbars 5, passing through the slide 4.

and slots 7 in the main frame 1, serve to retain the slide against the sides of the frame, while permitting their reciprocation thereon. Bars or plates 8, called herein the feed-bars,

, are mounted in slots in the slides 4 of such size as to permit the free movement of bars 8 transverse of the frame 1, but compel their movement with the slides 4 longitudinal of said frame.

Upon one end of the feed-bars 8 and at different inclinations are fixed the cutter'bars 9, Whereto are fastened, so as to be readily removable, a number of cutters or picks, 10. These are arranged as shown in Fig. I, turned in opposite directions on the two cutter-bars and projecting farther at the center of the mashafts 13 are mounted at their ends in cross bars 5 and a central standard, 6. Worm-shafts let are mounted transversely of the machine with their ends journaled in theslides 4. Slots in the sides of the main frame 1 permit the I shafts 14 to accompany the slides 4 in their reciprocation on the said frame. Worms 16 on the shafts 14 engage with worm-wheels 17, one on each feed-shaft 13, enabling the feeding of the bars 8 transversely of the machine by a rotation ofthe shafts 14. During the operation of the machine, however, the feeding of the picks to and from their work is performed by the engine by means of the following mechanism: 21 is a rod or bar fixed at its ends to one side of the main frame 1, as shown at 22. 23 are levers fulcru med upon the shafts l4 and having slots 24, through which the rod or bar 22 passes. 25, Fig. III, are ratchet wheels keyed to the shafts 14, and 26 are pawls engaging with said wheels and pivoted to the levers 23. It is to be observed that the bar 21 lies in a plane above the horizontal plane including the two shafts 14. When, therefore, the shafts 14 approach and recede from the bar 22, owing to their reciprocation with the slides 4, the levers 23 will be alternately forced to an approximately vertical position, and will thus alternately rotate he two ratchet-wheels 25, and consequently the shafts 14, to which the same are keyed. On each half-stroke, therefore, of the slides 4 the feedbars 8 and the picks will be fed forward a slight distance sufficiently to enable each pick on the cutter-bar to cut away the shoulder left by each pick behind it at the end of the former stroke.

27 27 are collars loosely surrounding the shafts 14 and connected bya yoke, 28, through the ends of which loosely pass said collars, and each end of the said yoke being held in place by two collars or flanges on each of the sleeves, as shown.

29 are arms rigidly connected to the pawls 26, having inclined surfaces at one end to ride on the flanges 31 of the collars 27.

32 is a hand-lever pivoted to the cross-bar 5 and connected by rod 33 to the yoke 28, and having a customary spring stop or bolt to lock it at any posit-ion. By shifting the upper end of the lever 32 toward the cutter-bar the incline of the arms 29 is made to ride upon the flanges 31 of collars 27, and the pawls 26 are therefore lifted from engagement with the ratchets 25, so that the further reciprocation of the entire cutter-frame will no longer feed forward the cutter bar, but will leave it free to be retracted. This retraction I effect rapidly by the following mechanism: Upon the main frame at 36, I fix rigidly a rack. Vith this rack one or the other of the loose gears 37 upon the shaft 14 engages. Fixed to each gear 37 is a ratchet-wheel, 38, which is surrounded by a cylindrical sleeve, 39, and engaged by a pawl, 41, pivoted within said sleeve. The sleeves 39 are each provided with an internal web, 39, which is journaled upon the shaft 14, as shown in Fig.VI, and by means of which the said sleeves are held normally loose upon the shafts 14 and actuate the same only when the clutch members 42 are brought into contact, the clutch members 42 being connected to the shafts 14 by feather 42 on the shaft and complementary groove 0 in the said member andoperated by the lever 32 through the medium of yoke 28. It will now be apparent that 'on the reciprocation of the cutterframe the gears 38 will alternately travel over the rack 36, and the pawls 41.engaging on op posite sides of ratchet-wheels 38,will impart a continuous rapid rotation to the sleeve 39. By throwing the lever 32 in one or the other direction an automatic slow, forward, or quick return motion is imparted to the feed.

43 43 represent engines of any ordinary or preferred form, preferably paired, as shown, and having their pitmen 44 connected to crank-disks 45 on the shaft 46.

47 are valve-rods actuated by excentrics 48 on shaft 46.

49 is a pinion gearing with cog-wheel-50 on shaft 51,which carries cranks 52, on the wrists of which are journaled connecting-rods 53, pivoted to rigid brackets 54 on the slides 4 for imparting reciprocating movement thereto.

are brackets fixed to each end of the frame 1, supporting arms 61,upon whose outer ends is fixed a platform, 62,whereon the operator can stand out of the reach of the working parts of the machine.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In combination with the reciprocating cutter-frame having feed-bars adapted to move in planes at right angles to the reciprocating movement, shafts connected to said bars, ratchet-wheels on said shafts, levers having pawls engaging with said ratchet-wheels, and a fixed bar or rod occupying slots in said levers, substantially as and for the purpose set forth.

2. In combination with the reciprocating cutter-frame, feedbars thereon adapted to receive motion transverse thereof, and shafts connected to said feed-bars, substantially as described, levers, ratchet-wheels, and pawls for operating said shafts, a trip for throwing said pawls out of engagement, and mechanism for operating said trip, substantially as set forth.

3. In combination with the reciprocating cutter-frame and feed-shafts 14 mounted thereon, gear-wheels journaled on said shafts and having pawl-and-ratchet connection therewith, and a fixed way or rack engaging said wheels and arranged substantially as and for the purpose set forth.

4. The combination, with the reciprocating cutter-frame 4, of shafts connected with said frame 4 and adapted to be carried sidewise thereby, astationary rack, gear-wheels on said shafts for engaging said rack, ratchets secured to said gears, sleeves surrounding said ratchets, pawls pivoted in said sleeves and engaging said ratchets, and a clutch for causingsaid sleeves to engage said shafts, substantially as set forth.

5. The combination, with the reciprocating cutter-frame, the feed-bars mounted transversely therein, and the feed shafts 13, having pinions for engaging said feed-bars, 0f the transverse shafts 14:, adapted to rotate shafts 13, as described, slotted levers and ratchets pivoted and keyed, respectively, on shafts 14, a stationary pin for occupying said slots, and pawls on said levers for engaging said ratchets, substantially as set forth.

6. In a mining machine, in combination with a main frame and a sliding cutter-frame mounted thereon, racks mounted on said outterframe transversely of the machine, a feedshaft having pinions engaging with said racks, Worm-wheels on said shaft, transverse shafts 14, having worms engaging with said wheels, ratchet wheels on shafts 14, levers having pawls engaging with said ratchets, a fixed bar or rod occupying slots in said levers, sleeves on said shafts 14, a segment-rack, gear-wheels having pawl-and-ratehet connection with said sleeves and engaging said raclz, clutches for engaging said sleeves and shafts 14, arms 29, engaging cams on said clutches, and means for operating said clutches, as set forth.

7. In combination with a main frame, en gines mounted thereon, slides guided on said main frame and carrying the cutter and feed bars, pitman-rod 44, adapted to rotate shafts 46, a pinion on said shaft, crank-shaft 51, having a gear-wheel engaging said pinion, brackets 54 on the reciprocating frame, and connect ing-rods pivoted to said brackets. and cranks 52, substantially as set forth.

' 8. Thecombination of a reciprocating frame, two cutter-bars set at different inclinations, and two or more feed-bars carrying each of said cutter-bars independently on the reciprocating frame, substantially as set forth.

JONATHAN WV. HARRISON. Witnesses:

O. R. MILLER, J. L. SMITH. 

